Stock Based Compensation Additional - (Details) (USD $)	6 Months Ended		3 Months Ended		12 Months Ended	3 Months Ended		6 Months Ended		3 Months Ended
	Aug. 03, 2013	Jul. 28, 2012	Aug. 03, 2013 Restricted Stock Class A Common Stock	Jul. 28, 2012 Restricted Stock Class A Common Stock	Feb. 02, 2013 Restricted Stock Class A Common Stock	Aug. 03, 2013 Stock Options Class A Common Stock	Jul. 28, 2012 Stock Options Class A Common Stock	Aug. 03, 2013 Stock Options Class A Common Stock	Jul. 28, 2012 Stock Options Class A Common Stock	Aug. 03, 2013 Employee Stock Purchase Plan Class A Common Stock	Jul. 28, 2012 Employee Stock Purchase Plan Class A Common Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized Compensation Expense			$ 9,900,000	$ 7,700,000	$ 6,400,000
Remaining Weighted-Average Vesting Period			4 years 6 months 180 days	2 years 9 months 18 days	2 years 3 months 18 days
Shares Sold										10,418	11,687
Compensation Expense	1,448,000	1,398,000	1,018,000	794,000		5,000	0	5,000	0	38,000	46,000
Intrinsic Value						$ 17,000	$ 28,000	$ 27,000	$ 50,000
Options Granted						20,127	0	20,127	0
Employee Stock Purchase Plan Share Purchase Discount										$ 3.62	$ 3.92